<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>盒子模型</title>
		<style type="text/css">
			/*
			网页的本质就是盒子模型摆放
			*/
			div,
			section{
				width: 100px;
				height: 100px;
				background-color: #0000FF;
			}
		</style>
	</head>
	<body>
		<div></div><hr />
		<section></section>
	</body>
</html>
